Hoisting mechanism for dumping trucks



J, CODER ET AL HOISTING MECHANISM FOR DUMPING TRUCKS July 31, 1928.

Filed June 25, 1926 2 Sheets-Sheet l 03 J CODER ET AL HOISTING MECHANISMFOR DUMPING TRUCKS Filed June 25, 1926 2 Sheets-Sheet 2 Patented July31, 1928.

UNITED STATES PATENT OFFICE.

HOISTING MECHANISM FOR DUIVIPIN G TRUCKS Application filed June 25,1926, Serial No 118,5?4, and in France April 26, 1926.

This invention relatesto improvements in and relating to hoistingmechanism for rear tipping lorry trailers comprising upright memberspivoted at the front end of theauX- iliary chassis with reference towhich the main chassis is tipped, a pulley mounted at the upper part oieach or said members, a drum mounted on said auxiliary chassis, a cableconnected to said drum and to the front end of said main chassis, saidcable passing over said pulley, means for rotating said drum to tip themain chassis and means to guide said main chassis durlng tipping.

According to the invention, the front end of said main chassis bearsdownwardly projecting brackets, the lower part of each of which isconnected to one end of the cable passing over the corresponding pulley,rollers with cooperating flanges being mounted respectively on the upperpart of said brackets for sliding along the corresponding uprightmembers to guide the main chassis during tipping, until the rollersleave said upright members, the brackets coming then in contact,respectively, with their corresponding pulley to act as a guide for themain chassis.

The invention will be described with reference to the accompanyingdrawings.

Fig. 1 is a side view of the trailer.

Fig. 2 is a side view with the chassis raised in the tipping position.

Fig. 3 is a. front elevation.

Fig. 4 is a plan.

On the front portion of the auxiliary chassis 1 two uprights 2 arepivotally mounted at 8 to a shaft carried by the auXiliary chassis 1. Agrooved pulley 4 is mounted at the upper end of each upright over whicha cable 5 passes. One end of each of the cables 5 is connected to a drum6 and each of the other ends 7 to the lower part of a. bracket 8depending from the chassis 9. This chassis 9, carrying the rear springshackles 10, pivots about an axis 11 arranged directly above the backaxle 12.

In front of each upright 2, a roller 13 and two lateral flanges 14 aremounted on the front end of the main chassis 9, said roller 13 and saidlateral flanges 14; cooperating with the upright member during tipping.

To tip the chassis the cables 5 are Wound on to the drum 6 in thedirection of the arrow 15, and owing to the bands 16of the uprights 2,the tension on tains the uprights against the chassis continuously.During this operation the rollers 13 roll up the uprights 2 which act asthe roller track while any lateral displacement of the chassis isprevented by the flanges 14. Near the end of the raising operation therollers 13 and flanges relieve the uprights, the brackets 8 then comingin contact with the upper pulleys 4 which then act as the guides (Fig.2). V

This tippingarrangement described may be applied to any trailer havingfour wheels.

Having thus described our invention, what we claim is:

In a hoisting mechanism for dumping trucks, the combination with anauxiliary chassis, or a main chassis hinged to said auxiliary chassis,means for-swinging said main chassis on its hinges, said meanscomprising a winding drum pivotally mounted on said auxiliary chassis,upright members pivoted at the front end of the auxiliary chassis,grooved pulleys mounted at the upper part of saidmembers, downwardlyprojecting brackets mounted on the main chassis infront of the uprightmembers, flexible hoisting means connected to the lowerpart of saidbrackets and to said winning drum and passing over said pulleys, andmeans for guiding said main chassis during tipping, comprising rollersmounted on the upper part of said brackets, guiding flanges disposedlaterally in regard to said rollers on the upright members, said rollersand flanges cooperating to guide the main chassis, until the rollersleave the upright members, whereupon the brackets come in contact withthe grooved pulleys, to act as guides for the main chassis.

' In witness whereof We aflix our signatures.

JOSEPH CODER. LOUIS CODER.

the cable main-

